"WE WANT to know what more we could have done . . . because there has to be more we could have done to prevent this." That's how one neighbor of Erika Peters reacted to the murders of the D.C. woman and her two young sons, allegedly by an abusive boyfriend. It is the right question to ask for friends, family, school, law enforcement and government, but -- as Ms. Peters's case so tragically demonstrates -- the complexity of abusive relationships defies pat answers. That's why society at large must do more to stop this kind of victimization.